Bonobos are?apes that are as closely related to humans as the chimp. But unlike chimpanzees and humans, bonobos resolve most conflicts with sex.
EnlargeUlindi, a female bonobo at the Leipzig Zoo in Germany, has had her genome sequenced, researchers report today (June 13), making bonobos the last of the great apes to have their genomes mapped. The resulting genetic code may help unlock the secrets that separate humans ? physically, intellectually and behaviorally ? from our closest primate relatives.
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Bonobos are often seen as the chimpanzee's peaceful cousin. The two primates look very similar and are very closely related, but for some reason chimps resolve conflicts with war while bonobos prefer?sex to resolve arguments. Previous studies have also shown that?bonobos are more generous?with food than chimps are.
"Bonobos and chimpanzees are very different in their behaviors," study researcher Kay Pruefer, of the Max Planck Institute for Evolutionary Anthropology, in Germany, told LiveScience. "While we are not yet able to look at the genome and know why that is, it's important to know the differences between bonobos and chimpanzees to tease apart what genes might be responsible for that."
Ulindi's genetic map
What stood out for the researchers were the genetic similarities found between humans and both chimps and bonobos. [Animal Code: Our Favorite Genomes]
They found that the Ulindi's genome is about 99.6 percent identical to the?chimpanzee genome?and 98.7 percent identical to the human genome ? basically they are just as related to humans as chimpanzees, which have about 1.3 percent of their genome different than ours.
However, a stretch of DNA that covers about 1.5 percent of Ulindi's genome matches more closely with the?genome of humans?than to their closer genetic relative the chimps. The chimps, on the other hand, have a different section of the genome that's more similar to humans than to bonobos.
"There are certain parts of the human genome where you can see the humans are more closely related to bonobos than chimpanzees and other parts where they are more closely related to chimps than bonobos," Pruefer said. "This is a much larger amount than we previously thought."
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